package juc.day02;

import java.util.HashMap;
import java.util.concurrent.CountDownLatch;

public class CountDownLatchDemo {
    public static void main(String[] args) throws InterruptedException {
        new HashMap<>();
        CountDownLatch countDownLatch = new CountDownLatch(6);
        for(int i=1;i<=6;i++){
            new Thread(()->{
                System.out.println(Thread.currentThread().getName()+"号同学离开教室");
                countDownLatch.countDown();
            },String.valueOf(i)).start();
        }
        countDownLatch.await();
        System.out.println(Thread.currentThread().getName()+"班长离开教室锁门");
    }
}
